Laurent Huc, compound designer at Michelin in France, started with 3,000 different compounds during development of the company's latest ultra-high performance (UHP) tire, the Pilot Sport 4S (PS4S).

Michelin's got a new performance tire out. Called the Pilot Sport 4S (PS4S), it's a direct replacement ... before even having to think about replacing a set. But then she adds this intriguing ...

Laurent Huc, compound designer at Michelin in France, started with 3,000 different compounds during development of the company's latest ultra-high performance (UHP) tire, the Pilot Sport 4S (PS4S).